CN218769367U - Circuit breaker - Google Patents

Abstract

A circuit breaker belongs to the technical field of low-voltage electrical appliances. Comprises a contact system, an electromagnet, a main shaft, a connecting rod and a lock catch assembly; the electromagnet is a clapper type electromagnet and comprises an iron core and an armature, the armature can swing relative to the iron core, and a coil is wound on the iron core; when the circuit breaker is switched on, the coil is electrified, the armature is attracted and close to the iron core, the armature drives the connecting rod to act, the connecting rod drives the main shaft to perform switching-on rotation, the main shaft drives the moving contact system to perform switching-on action, and after the circuit breaker enters a switching-on state, the locking assembly locks the main shaft, so that the circuit breaker is locked in the switching-on state. The advantages are that: the clapper type electromagnet is adopted to replace a solenoid type electromagnet in the prior art, so that the connecting rod structure can be simplified, and the working reliability can be improved.

Description

Circuit breaker

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, concretely relates to circuit breaker.

Background

The conventional air circuit breaker generally uses a spring mechanism for operation, but the spring mechanism has many parts and is complicated to operate, so that some conventional circuit breakers use an electromagnet instead of the spring mechanism. The existing electromagnetic actuating circuit breaker drives a connecting rod assembly by using a solenoid electromagnet, and the connecting rod assembly drives a contact system of the circuit breaker to act through a main shaft of the circuit breaker, so that the closing action of the circuit breaker is realized.

The solenoid electromagnet generally comprises a movable iron core, a static iron core and a coil, when the electromagnet is electrified, the movable iron core extends out to drive the connecting rod assembly, the moving mode of the electromagnet is an upward jacking mode, the connecting rod structure matched with the electromagnet is generally complex, simplicity of the connecting rod assembly of the circuit breaker is not facilitated, and reliability is low.

In view of the above-mentioned prior art, there is a need for a reasonable improvement in the structure of the existing electromagnets. The applicant has made an advantageous design for this purpose, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a circuit breaker, it adopts clapping formula electro-magnet as drive assembly, drives the connecting rod action by clapping formula electro-magnet, connecting rod simple structure, and the reliability is high.

The utility model aims at achieving the purpose, the circuit breaker comprises a contact system, an electromagnet, a main shaft, a connecting rod and a lock catch assembly; the electromagnet is a clapper type electromagnet and comprises an iron core and an armature, the armature can swing relative to the iron core, and a coil is wound on the iron core; when the circuit breaker is switched on, the coil is electrified, the armature is attracted and close to the iron core, the armature drives the connecting rod to act, the connecting rod drives the main shaft to perform switching-on rotation, the main shaft drives the moving contact system to perform switching-on action, and after the circuit breaker enters a switching-on state, the locking component locks the main shaft, so that the circuit breaker is locked in the switching-on state.

The utility model discloses a concrete embodiment in, still include the separating brake spring, the separating brake spring be the extension spring, its one end is connected the main shaft, the other end is fixed, works as hasp subassembly unblock the main shaft, the separating brake spring drive the main shaft carry out the separating brake and rotate, and then the contact system also carry out the separating brake action.

In another specific embodiment of the present invention, the contact system is located in the casing of the circuit breaker, the arc extinguish chamber is located at the upper opening of the casing, the electromagnet is located on the right side of the contact system, the connecting rod, the opening spring and the locking component are all located above the electromagnet, and the spindle is located between the contact system and the electromagnet.

In another specific embodiment of the present invention, the main shaft is fixed with a matching rod, the matching rod is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the armature.

In another specific embodiment of the present invention, the locking assembly includes a first locking member and a second locking member, the first locking member is used for locking with the engaging rod of the main shaft, and the second locking member is used for locking with the first locking member.

In still another specific embodiment of the present invention, the rotation end of the engaging rod is provided with a buckle head, the first buckle member includes a rotation center, a first buckle edge, a second buckle edge and a sliding engagement surface, the first buckle member realizes its own rotation setting through the rotation center, the first buckle edge be used for with the buckle head snap fit, the second buckle edge be used for with the second buckle member snap fit, the sliding engagement surface be used for letting out the swing of the buckle head.

In still another specific embodiment of the present invention, the second fastening member includes an installation center, an outer edge fastening surface and a notch portion, the second fastening member realizes its own rotation setting through the installation center, the outer edge fastening surface is used for cooperating with the second fastening member along the fastening, and the notch portion is used for letting off the rotation of the first fastening member.

In a more specific embodiment of the present invention, the other end of the opening spring is fixed to a circuit breaker housing of the circuit breaker housing the contact system.

In yet another specific embodiment of the present invention, the circuit breaker has a driving circuit therein, the driving circuit is used for controlling the movement of the electromagnet, the driving circuit includes a current discharging unit, the current discharging unit includes a resistor and a diode, and the resistor is connected in parallel with the coil after being connected in series with the diode.

In a still more specific embodiment of the present invention, the circuit breaker has a driving circuit therein, the driving circuit is used for controlling the operation of the electromagnet, the driving circuit includes a current-discharging unit, the current-discharging unit includes a resistor, a diode and a capacitor, the resistor, the diode and the capacitor are connected in series and then connected in parallel with the coil.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: the clapper type electromagnet is adopted to replace a solenoid type electromagnet in the prior art, and the clapper type electromagnet is used as a driving part to drive the connecting rod to act, so that the connecting rod structure can be simplified, and the working reliability of the connecting rod structure is improved.

Drawings

Fig. 1 is a schematic diagram of a circuit breaker in a closing state.

Fig. 2 is a schematic diagram of the circuit breaker in the open state.

Fig. 3 is a schematic view of a partial structure of the circuit breaker in a closing state.

Fig. 4 is a schematic view of a part of the structure of the circuit breaker in the open state.

Fig. 5 is a structural form of the driving circuit of the present invention.

Fig. 6 is another structural form of the driving circuit of the present invention.

In the figure: 1. a contact system, 11 moving contacts and 12 fixed contacts; 2. an arc extinguishing chamber; 3. electromagnet, 31, iron core, 32, armature, 33 coil; 4. main shaft, 41, matching rod, 411, buckle head; 5. a connecting rod; 6. a brake separating spring; 7. the locking device comprises a locking component 71, a first fastener 711, a rotation center 712, a first fastener edge 713, a second fastener edge 714, a sliding matching surface 72, a second fastener 72, an installation center 721, an outer edge fastener surface 722, 723 and a notch part; 81. power supply, 82, switch, 83, resistor, 84, diode, 85, capacitor.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but the description of the embodiments is not intended to limit the technical solutions, and any changes made in the form of the present invention rather than the essential changes should be considered as the protection scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the position shown in fig. 1, and thus should not be construed as particularly limiting the technical solution provided by the present invention.

As fig. 1, fig. 2, the utility model relates to a circuit breaker, it includes contact system 1, explosion chamber 2, electro-magnet 3, main shaft 4, connecting rod 5, separating brake spring 6 and hasp subassembly 7. When the circuit breaker is switched on, the electromagnet 3 drives the connecting rod 5 to act, the connecting rod 5 drives the main shaft 4 to perform switching-on rotation, and the main shaft 4 drives the contact system 1 to perform switching-on action. When the circuit breaker enters a closing state, the locking assembly 7 locks the main shaft 4, so that the circuit breaker is locked in the closing state.

When the breaker is opened, the lock catch component 7 unlocks the main shaft 4, the opening spring 6 drives the main shaft 4 to perform opening rotation, and then the contact system 1 performs opening motion. As the main shaft 4 rotates, the connecting rod 5 and the electromagnet 3 are reset due to the connection relationship.

As shown in fig. 1, the contact system 1 is located in a housing of a circuit breaker, the arc extinguishing chamber 2 is located at an upper opening of the housing, and the electromagnet 3 is located at the right side (shown in fig. 1) of the contact system 1, that is, for the circuit breaker, the electromagnet 3 is located at the front side of the contact system 1. The connecting rod 5, the opening spring 6 and the locking component 7 are all positioned above the electromagnet 3, and the spindle 4 is positioned between the contact system 1 and the electromagnet 3.

Specifically, the contact system 1 includes a movable contact 11 and a stationary contact 12, and the movable contact 11 can rotate relative to the stationary contact 12, thereby realizing contact or separation between the two. When contacting, the contact system 1 is closed. When separated, the contact system 1 is separated.

The arc extinguish chamber 2 is located above the contact system 1, when the contact system 1 breaks current and generates electric arc, the electric arc enters the arc extinguish chamber 2 upwards and then extinguishes in the arc extinguish chamber 2. And the current is cut off.

The electromagnet 3 is a clapper type electromagnet, the electromagnet 3 comprises an iron core 31 and an armature 32, the armature 32 can swing relative to the iron core 31, a coil 33 is wound on the iron core 31, and when the electromagnet is electrified, the armature 32 is attracted to be close to the iron core 31. When the circuit breaker is switched on, the coil 33 is electrified, the armature 32 is attracted and close to the iron core 31, the armature 32 drives the connecting rod 5 to move, the connecting rod 5 drives the spindle 4 to perform switching-on rotation, the spindle 4 drives the contact system 1 to perform switching-on movement, and after the circuit breaker enters a switching-on state, the locking assembly 7 locks the spindle 4, so that the circuit breaker is locked in the switching-on state. In the present embodiment, the armature 32 is arranged above the iron core 31 in a swinging manner, and is hinged to the iron core 31 at one side edge.

The spindle 4 is typically a metal circular shaft, which is connected to the connecting rod 5 on one side and to the contact system 1 on the other side. In particular, the other side is connected to a plurality of sets of contact systems 1. For example, the circuit breaker is a three-phase circuit breaker, and the main shaft 4 is connected to three moving contacts 11 in the three-group contact system 1. If the circuit breaker is a four-phase circuit breaker, the main shaft 4 is connected with four moving contacts 11 in the four-group contact system 1.

The main shaft 4 is fixed with a matching rod 41, and the matching rod 41 is fixed with the shaft body of the main shaft 4, and can be realized by adopting a welding process and other processes. Therefore, the engagement lever 41 and the spindle 4 rotate in synchronization, and if the engagement lever 41 is locked, the spindle 4 cannot rotate. The matching rod 41 is hinged with one end of the connecting rod 5, the connecting rod 5 is rod-shaped, the other end of the connecting rod 5 is hinged with the armature 32, and therefore the armature 32 can be driven to rotate by the action of the connecting rod 5, and the spindle 4 can be further rotated.

The opening spring 6 is used for driving the breaker to perform opening action, energy is stored in the closing process of the breaker, and when the breaker performs opening action, the opening spring 6 releases energy to drive the breaker to perform opening action.

In the present embodiment, the opening spring 6 is a tension spring, one end of which is connected to the main shaft 4, specifically to the engagement rod 41 of the main shaft 4, and the other end of which is fixed to another component of the circuit breaker, for example, a circuit breaker housing for accommodating the contact system 1.

The locking assembly 7 is used for locking the circuit breaker in a closing state, and specifically, the locking assembly 7 is used for locking the main shaft 4 to enable the circuit breaker to be in the closing state.

As shown in fig. 3 and 4, the locking member 7 includes a first locking member 71 and a second locking member 72, the first locking member 71 is used for locking with the spindle 4, and the second locking member 72 is used for locking with the first locking member 71. Specifically, a buckle head 411 is disposed at a rotating end of the matching rod 41 of the spindle 4, and the buckle head 411 is in buckle fit with the first buckle piece 71, that is, the first buckle piece 71 can limit whether the buckle head 411 moves or not, so as to buckle the matching rod 41, and finally the spindle 4 is locked.

The first buckle member 71 is a swing rod member, and includes a rotation center 711, a first buckle edge 712, a second buckle edge 713, and a sliding engagement surface 714. The rotation center 711 is generally a hole, and the first fastening member 71 is rotatably disposed by the rotation center 711.

The first snapping edge 712 is configured to snap-fit with the snapping head 411, and specifically, when the circuit breaker is in a closed state, the first snapping edge 712 snaps with the snapping head 411.

The second snap edge 713 is used for snap-fitting with the second snap 72, that is, when the circuit breaker is in a closed state, the second snap edge 713 is snapped with the second snap 72.

The sliding matching surface 714 is arc-shaped, when the first buckle piece 71 is unlocked by the second buckle piece 72, the first buckle piece 71 rotates, and the sliding matching surface 714 is used for avoiding the swing of the buckle head 411.

In the present embodiment, the side section of the first snap fastener 71 is shaped like an axe, but other shapes are also possible, so long as the first snap fastener has the rotation center 711, the first snap fastener edge 712, the second snap fastener edge 713, and the sliding mating surface 714, which is within the protection scope of the present invention.

The second fastening member 72 has a notched disc-shaped side cross-section, and the second fastening member 72 includes an installation center 721, an outer edge fastening surface 722, and a notched portion 723.

The mounting center 721 is generally a hole, and the second snap member 72 is rotatably disposed through the mounting center 721.

The outer edge fastening surface 722 is a surface on the outer edge of the second fastening member 72, has an arc shape, and is used for fastening with the second fastening edge 713.

The cut portion 723 is used to allow the first fastening member 71 to rotate. Specifically, when the circuit breaker is opened, the second fastener 72 rotates to unlock the first fastener 71, and when the first fastener 71 rotates, the gap 723 is opened at this time to allow the first fastener 71 to rotate.

Referring to fig. 5 and 6, the circuit breaker has a driving circuit, or electromagnet control circuit. The drive circuit is used to control the current in the coil 33 of the electromagnet 3 and thereby drive the operation of the electromagnet 3.

The driving circuit comprises a leakage unit, the leakage unit comprises a resistor 83 and a diode 84, and the diode 84 is connected with the resistor 83 in series and then connected with the coil 33 in parallel. The draining unit is used for releasing the energy in the coil 33.

When the coil 33 is energized, a magnetic field is generated, and the armature 32 of the electromagnet 3 operates. Because the electromagnet 3 is a clapper type electromagnet in the embodiment, the armature 32 is attracted, so as to drive the connecting rod 5 to act.

The driving circuit further comprises a power source 81 and a switch 82, wherein the power source 81 and the switch 82 are connected in series with the coil 33. The power supply 81 supplies power to the coil 33, and the switch 82 is used for controlling the on-off of the circuit.

When switch 82 is closed, diode 84 prevents the current from passing through resistor 83; when the switch 82 is turned off, the coil 33, the resistor 83 and the diode 84 form a loop. At this time, the inductor current of the coil 33 may pass through the resistor 83 and the diode 84 in opposite directions.

As shown in fig. 5, the stored energy in the coil 33 is discharged through the resistor 83.

As in fig. 6, a capacitor 85 is also included. A diode 84, a resistor 83 and a capacitor 85 are connected in series and then connected in parallel with the coil 33. The capacitor 85 and the coil 33 form an LC resonant circuit, the energy stored in the coil 33 can be rapidly decreased, and the diode 84 prevents the reverse current from being generated after the current reaches zero.

Usually, the resistor R1 is a power resistor, and the capacitor C1 is a tantalum capacitor.

Claims (10)

1. A circuit breaker comprises a contact system (1), an electromagnet (3), a main shaft (4), a connecting rod (5) and a locking assembly (7); the method is characterized in that: the electromagnet (3) is a clapper type electromagnet, the electromagnet (3) comprises an iron core (31) and an armature (32), the armature (32) can swing relative to the iron core (31), and a coil (33) is wound on the iron core (31); when the circuit breaker is switched on, coil (33) circular telegram, armature (32) attracted and be close to iron core (31), armature (32) drive connecting rod (5) action, connecting rod (5) drive main shaft (4) and carry out the combined floodgate rotation, main shaft (4) drive contact system (1) and carry out the combined floodgate action, get into the state of combined floodgate after, hasp subassembly (7) lock main shaft (4) to lock the circuit breaker in the state of combined floodgate.

2. A circuit breaker according to claim 1, wherein: still include separating brake spring (6), separating brake spring (6) be the extension spring, main shaft (4) is connected to its one end, the other end is fixed, works as hasp subassembly (7) unblock main shaft (4), separating brake spring (6) drive main shaft (4) carry out the separating brake and rotate, and then contact system (1) also carry out the separating brake action.

3. A circuit breaker according to claim 2, wherein: contact system (1) be located the casing of circuit breaker, and explosion chamber (2) are located the top opening part of casing, electro-magnet (3) be located the right side of contact system (1), connecting rod (5), separating brake spring (6) and hasp subassembly (7) all be located the top of electro-magnet (3), main shaft (4) be located between contact system (1) and electro-magnet (3).

4. A circuit breaker according to claim 1, wherein: a matching rod (41) is fixed on the main shaft (4), the matching rod (41) is hinged with one end of the connecting rod (5), and the other end of the connecting rod (5) is hinged with the armature (32).

5. A circuit breaker according to claim 1, wherein: the locking assembly (7) comprises a first fastening member (71) and a second fastening member (72), the first fastening member (71) is used for being fastened with the matching rod (41) of the main shaft (4), and the second fastening member (72) is used for being fastened with the first fastening member (71).

6. A circuit breaker according to claim 5, wherein: the rotatory end of cooperation pole (41) on be equipped with hasp head (411), first hasp (71) including rotation center (711), first hasp along (712), second hasp along (713) and sliding fit face (714), first hasp (71) realize its self rotation setting through this rotation center (711), first hasp along (712) be used for with hasp head (411) snap-fit, the second hasp along (713) be used for with second hasp (72) snap-fit, sliding fit face (714) be used for letting out the swing of hasp head (411).

7. A circuit breaker according to claim 6, wherein: second hasp piece (72) including installation center (721), outer fringe hasp face (722) and breach portion (723), second hasp piece (72) realize its own rotation setting through this installation center (721), outer fringe hasp face (722) be used for with second hasp along (713) snap-fit, breach portion (723) be used for letting out the rotation of first hasp piece (71).

8. A circuit breaker according to claim 2, wherein: the other end of the opening spring (6) is fixed on a breaker shell of the breaker, which contains the contact system (1).

9. A circuit breaker according to claim 1, wherein: the circuit breaker is internally provided with a driving circuit, the driving circuit is used for controlling the action of the electromagnet (3), the driving circuit comprises a leakage unit, the leakage unit comprises a resistor (83) and a diode (84), and the resistor (83) is connected with the diode (84) in series and then is connected with the coil (33) in parallel.

10. A circuit breaker according to claim 1, wherein: the circuit breaker is internally provided with a driving circuit, the driving circuit is used for controlling the action of the electromagnet (3), the driving circuit comprises a leakage unit, the leakage unit comprises a resistor (83), a diode (84) and a capacitor (85), and the resistor (83), the diode (84) and the capacitor (85) are connected in series and then are connected with the coil (33) in parallel.

Images